Title: Optimum fermentation conditions of fermenting residues of aquatic products by mixed strains with response surface methodology
Abstract: With the free-amino-acid nitrogen content as an examining index,we conducted a single-factor experiment for shaker speed and material liquid,then inoculation,fermentation temperature,and fermentation time. Response surface methodology was used to design an experiment on the basis of the single-factor experiment results; a quadratic regression model of shaker speed,inoculation,and fermentation temperature was established by Design Expert 7. 0. The optimal conditions were as follows: shaker speed of 203 r / min,inoculum size of5%,and temperature of 30 ℃. Under these conditions,the free-amino-acid nitrogen content was 13. 891 g / L,representing an increase of 12. 34% over the previous value( 12. 365 g / L). The optimized process caused the bacterial manure product quality to exceed the national standard; the total nitrogen content was approximately15. 8% and the total organic matter content was approximately 37%.
Publication Year: 2016
Publication Date: 2016-01-01
Language: en
Type: article
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